TM Glock 17 Keeps Half Cycling

[Boo-Sabum Ben]

As above, new mag full of propane, brand new Glock 17 from TM.

After a few shots, it won't cycle all the way. It will stop on the way back, meaning I have to manually cock it to fire the next shot.

Its not a struggle to cock it, its less than a month old, no upgrades/fiddling done yet, its been kept very well lubed all day today with silicone spray.

Any ideas?

[Boo-Sabum Ben]

Re: TM Glock 17 Keeps Half Cycling

It seems that the blowback unit is catching on the gas routers on the magazines. No shims or anything in the mags, they are completely standard.

Anything that I need to do to the blowback unit?

[Boo-Sabum Ben]

Re: TM Glock 17 Keeps Half Cycling

found it. The rear part of the lower frame mech, that holds the hammer, had come loose, allowing it to ride up and catch on the blowback unit as it came back, for anyone else with this issue!